Improvement in sawing-machines



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cAsIMIn AMsLElRg---o-r-fsr. LoUIs, MISSOURI.`

-Lenm VPatent Ivo. 95,302, dated satema 28, 1869.

nI/IPRovzuI/IeNIL*I IN lseminare-MeInnes.

The Schedule referred to these Letters Patent and making part of the ca me.

This invention relates to the arrangement'of th'e' pitman moving the saw with a bead-slide, in such v'wise that the operator, by moving the bead-slide, may

vary the stroke of the saw as he may see proper, and this without any interruption of the movement of the saw. The said saw may, therefore, be'applied to the varying kinds of scroll-sawing in which curves of different iadii are made, with economy of timeand labor. This invention further -relates to certain details of construction hereinafter more fully shown.

' To enable those herein skilled to make and use my said improvement, I will now fully describe the same, referring to the accompanying Figure l as afi-ont view;

Figure 2, as a longitudinalview; and to Figure 3, as a detail elevation, showing the sliding head of the saw-pitman and its adjustment.

I support the scroll-saw, and its operating-devices, upon a suitable frame, usually. of wood or cast-iron, A. v Upon the plate Af, of said frame, is the'bracket B, whichhas, at its front end, the usual guides Ib, for the saw-lifter C, this being connected by a strap, c, to a bent lever, I), which has its fulcrum onthe vibrating 'bar E, at e.

. The vibrating bar E is pivoted at e on'a standard upon the bracket B.

To the lower end ofthe lifter C the saw F is attached, it being connected at its own. lower, en d to a slide, G, moving between proper guides.

To detach the saw, the operator releases the clamp holding the lever D down on the bar E, so that the lever I) may rise to' a nearly vertical position. The

band c then is relaxed, and the lifter Omay be moved down to release the saw-blade. By drawing the lever ,i D tightly against the bar E, the tension of the sawblade may be increased.

'Ihe slide G has a link, g, connecting with a rockbar, H, which has its fulcrum on the frame A at b, andthe end hereof is connected, by a link, h, with the lvibrating bar E, thus completing the attachment.

' The slide G is moved' by a pitman, I, which has a slidingy head, c', moving on a rock-lever, K, the fulcrum whereof is at k on the frame A. l t The endof thelever K connects, by a rod, L, with the crank-wheel or disk M, this being on a shaft, m., resting upon bearings in the main frame. f Power is transmitted to the shaft m by a pulley and band from the driving-wheel N, the shaft whereof is moved by a treadle-attachment (or other power-device) in the usual manner.

, In order to vary the stroke of the pitman I, (as in the nature of this invention,) the sliding head 'tis moved longitudinally on Athe lever K, to increase or diminish its distance from the fulcrum k; rIhis 'is done -by attaching the rod rO to the said head t', said rod connecting with an arm, p on the shaft P. On the same shaft is the arml q, which is moved by the handbar Q. The latter has notchesfor fixing-its position whenadjusted, whereby the operator is enabled toreadily move the sliding vhead t', and thusnvarythe stroke of the saw whilst cutting or sawing therewith, or, when the hand-bar Q is held by one of its notches to its position relative to ther main frame, Ythe stroke of the sawA remains invariable, as is usually the case.

This feature of adjustment of stroke ishof advantage when using lgig-saws, to pass the stuff about the same. For this purpose the saw is moved entirely below the tablefA.' by using the hand-bar Q to move the slide 'i tothe end of the lever K, then the stuff is-moved over the saw, which rises up through the hole in the stuff, and mayt-hereupon be adjusted to cut without further detention. 4

To clear'the stud of the sawdust, so that the scrollmark may be clearly visible to the operator, I arrange the clamp-foot R hollow. Within the same, I arrange a piston-head, moved by a piston-rod, fr, connecting with the bar E, By the vibration of this bar, a current of air is forced upon the table, to clear off the sawdust. Ilo draw in the air, the foot It has a series Aof perforations.

Having thus fully described. my invention, What I claim, isn v The pitman I, arranged with a sliding head, t', and combined with a rock bar K, substantially as set forth.

' GASIMIR AMSLER.

-IVitnessesz l GEORGE P. HERTHEL, Jr.,

WILLIAM W. HERTHEII 

